//方式1
export let username1 = "张三1";
export let getFun1 = function(){console.log("我是模块方法1");} 

//方式2
let username2 = "张三2";
let getFun2 = function(){console.log("我是模块方法2");} 
export {username2, getFun2};

//默认方式
export default {
    username3: "张三3"
    ,getFun3: function(){console.log("我是模块方法3");}
}

